EP0271327B1 - Flüssigkristallpolyester enthaltende Harzzusammensetzung - Google Patents

Flüssigkristallpolyester enthaltende Harzzusammensetzung Download PDF

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Publication number
EP0271327B1
EP0271327B1 EP87310816A EP87310816A EP0271327B1 EP 0271327 B1 EP0271327 B1 EP 0271327B1 EP 87310816 A EP87310816 A EP 87310816A EP 87310816 A EP87310816 A EP 87310816A EP 0271327 B1 EP0271327 B1 EP 0271327B1
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EP
European Patent Office
Prior art keywords
composition
fibre
liquid crystal
polyester
particulate filler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87310816A
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English (en)
French (fr)
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EP0271327A2 (de
EP0271327A3 (en
Inventor
Mitsuo Wada
Toshio Kanoe
Takayuki Ishikawa
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Polyplastics Co Ltd
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Polyplastics Co Ltd
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Publication date
Application filed by Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Publication of EP0271327A2 publication Critical patent/EP0271327A2/de
Publication of EP0271327A3 publication Critical patent/EP0271327A3/en
Application granted granted Critical
Publication of EP0271327B1 publication Critical patent/EP0271327B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/38—Polymers
    • C09K19/3833—Polymers with mesogenic groups in the side chain
    • C09K19/3838—Polyesters; Polyester derivatives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/016—Additives defined by their aspect ratio
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K2019/521—Inorganic solid particles

Definitions

  • This invention relates to a thermoplastic resin composition having excellent surface characteristics and suitable as moulding materials for plastic molded articles which must have high accuracy and excellent surface characteristics, e.g., components of electronic appliances, parts such as pickup parts of a compact disk player and ferrules of optical fibers.
  • a group of plastics the so-called engineering plastics are replacing metallic parts by virtue of their high strength.
  • a group of plastics called a liquid crystal polyester melts while maintaining its crystalline structure.
  • this also leads to an advantage that the viscosity in a molten state is low, thus making it easy to mold.
  • these plastics have a drawback with respect to surface characteristics because the molecules of these plastics are highly oriented on the surface thereof, which is raising a problem on practical use.
  • the drawback with respect to surface characteristics resides in that the occurrence of repeated friction or repeated application of percussions on the surface thereof leads to the fibrillation of the surface thereof, thus causing fluffing. Therefore, the molded articles not only have a poor appearance but also have problems of lowering in accuracy of the molded articles and a possible adverse effect of fibrillation and fluffing on electronic devices in which the molded articles are used. For this reason, the elimination of the above-mentioned problems is desired.
  • the present inventors have made various studies on these problems, which led to the present invention.
  • EP 0135310 provides moulding compositions for the encapsulation of electronic components which comprise a liquid crystalline polyester (lcp) and 40-80 wt.% of a particulate inorganic filler and discloses that in some applications where the electronic component undergoing encapsulation is not particularly fragile, discontinuous glass fibres or other similar filler fibrous reinforcement may be included with the particulate inorganic material.
  • lcp liquid crystalline polyester
  • the present inventors have made various studies on the surface characteristics of a newly developed melt processable polyester capable of forming an anisotropic melt phase (hereinafter abbreviated to "liquid crystal polyester”), particularly on the solution to the problems through the use of additives. As a result, the present inventors have found that a particulate material unexpectedly improves the surface characteristics of the moulded articles and that the incorporation of a fibrous filler provides high strength without affecting the improvement in the surface characteristics.
  • the present invention provides a liquid crystal polyester composition, characterized in that it comprises at least 30 percent by weight of a polyester and 0.5 to 70 percent by weight of a particulate filler material, the particles of which have an aspect ratio of 3 or less, the polyester is melt processable and displays in the molten state anisotropy, and in that a fibrous material is incorporated together with the particulate filler material and in that the fibrous material is incorporated in an amount equal to or less than that of said particulate filler material.
  • the liquid crystal polymer which may be used in the present invention is a melt processable polyester and has properties such that the molecular chains are regularly arranged parallel to each other in a molten state.
  • the state in which molecules are arranged in this way is often called a liquid crystal state or a nematic phase of a liquid crystal material.
  • Such polymer molecules are generally comprised of polymers which are slender and flat and have considerably high rigidity along the major axis of the molecules and a plurality of chain-extending bonds which are usually in either a coaxial relationship or a parallel relationship with each other.
  • the properties of the anisotropic molten phase may be examined by a customary polar metric method using crossed polarizers. More particularly, the anisotropic molten phase can be examined by observing a molten sample placed on a Leitz hot stage in a nitrogen atmosphere at a magnification of 40 under a Leitz polarization microscope.
  • the above-mentioned polymer is optically anisotropic. Namely, when it is placed between crossed polarizers, it permits transmission of a light beam. If the sample is optically anisotropic, the polarized light will be transmitted, even when it is in a static state.
  • the components of the polymer which forms the anisotropic molten phase as mentioned above are those selected from the group consisting of:
  • Aromatic polyazomethines are also a polymer which forms the anisotropic molten phase, although they are not included in the category of the above-mentioned combinations of components.
  • aromatic polyazomethines include poly(nitrilo-2-methyl-1,4-phenylenenitriloethylidyne-1,4-phenyleneethylidyne); poly(nitrilo-2-methyl-1,4-phenylenenitrilomethylidyne-1,4-phenylenemethylidyne; and poly(nitrilo-2-chloro-1,4-phenylenenitrilomethylidyne-1,4-phenylenemethylidyne).
  • polyester carbonates are also a polymer which forms the anisotropic molten phase, although they are not included in the category of the above-mentioned combinations of components. They are comprised essentially of 4-oxybenzoyl units, dioxyphenyl units, dioxycarbonyl units, and terephthaloyl units.
  • polyesters I), II), and III) and polyester-amide VIII) which are polymers capable of forming an anisotropic molten phase suitable for use in the present invention may be produced by various ester forming processes in which organic monomer compounds having functional groups capable of forming required repetitive units through condensation are mutually reacted.
  • the functional groups of these organic monomer compounds include carboxyl group, hydroxyl group, ester group, acyloxy group, acyl halide group, and amino group.
  • the organic monomer compounds can be reacted by a melt acidolysis method in the absence of any heat exchange fluid. According to this method, the monomers are first heated together to form a melt of reactants. As the reaction proceeds, solid polymer particles are suspended in the melt. Vacuum may be applied in order to facilitate the removal of volatile matter (e.g., acetic acid or water) which is produced as a by-product in the final stage of the condensation.
  • volatile matter e.g., acetic acid or water
  • a slurry condensation method may also be adopted in forming a liquid crystal aromatic polyester suitable for use in the present invention.
  • the solid product is obtained in such a state that it is suspended in a heat exchange medium.
  • the organic monomer reactants from which the liquid crystal polyester is derived may be used in the reaction in a modified form in which the hydroxyl groups of such monomers have been esterified (i.e., in the form of a lower acyl ester).
  • the lower acyl group preferably has 2 to 4 carbon atoms. It is preferred that acetates of the organic monomer reactants be used in the reaction.
  • the amount of the catalyst is generally about 0.001 to 1% by weight, preferably about 0.01 to 0.2% by weight, based on the total weight of the monomers.
  • liquid crystal polymers suitable for use in the present invention tend to be substantially insoluble in usual solvents, which renders them unsuitable for use in solution processing. However, as mentioned above, these polymers may be readily processed by ordinary melt processing. Especially preferably liquid crystal polymers are those soluble in pentafluorophenol to some extent.
  • the liquid crystal polyester suitable for use in the present invention have a weight-average molecular weight of about 2,000 to 200,000, preferably about 10,000 to 50,000, and particularly preferably about 20,000 to 25,000.
  • the wholly aromatic polyester-amide suitable for the present invention has a molecular weight of about 5,000 to 50,000, preferably about 10,000 to 30,000, e.g., 15,000 to 17,000.
  • the molecular weight may be determined by gel permeation chromatography and other standard determination methods which do not involve the formation of a solution of polymers, e.g., by determining the terminal groups by infrared spectroscopy in the form of a compression-molded film. Alternatively, the molecular weight may be determined by a light scattering method in the form of a pentafluorophenol solution.
  • liquid crystal polyesters and polyester-amides exhibit an inherent viscosity (I.V.) of at least about 2.0 dl/g, e.g., about 2.0 to 10.0 dl/g, as determined at 60°C in the form of a solution prepared by dissolving the polymer in pentafluorophenol to have a polymer concentration of 0.1% by weight.
  • I.V. inherent viscosity
  • Polyesters which form an anisotropic melt phase suitable for use in the present invention are aromatic polyesters and aromatic polyester-amides and may also include polyesters which partially contain aromatic polyester units and aromatic polyester-amide units in the same molecular chain.
  • Examples of the compounds constituting the above-mentioned polymers include naphthalene compounds such as 2,6-naphtalenedicarboxylic acid, 2,6-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, and 6-hydroxy-2-naphthoic acid, biphenyl compounds such as 4,4 ⁇ -biphenyldicarboxylic acid and 4,4 ⁇ -dihydroxybiphenyl, compounds represented by the following general formulae (I), (II), or (III): [wherein X is a group selected from among an alkylene (having 1 to 4 carbon atoms), an alkylidene, -O-, -SO-, -SO2-, -S-, and -CO-; and Y is a group selected from -(CH2) n - (wherein n is 1 to 4) and -O(CH2) n O- (wherein n is 1 to 4)]; parasubstituted benz
  • liquid crystal polyester which is used in the present invention may be a polyester partially containing a polyalkylene terephthalate portion which does not exhibit any anisotropic melt phase in the same molecular chain besides the above-mentioned components.
  • the alkyl group has 2 to 4 carbon atoms.
  • polymers comprised of the above-mentioned components
  • polymers containing at least one member selected from among naphthalene compounds, biphenyl compounds, and para-substituted benzene compounds as essential component are more preferable.
  • Particularly preferable para-substituted benzene compounds include p-hydrobenzoic acid, methylhydroquinone, and 1-phenylethylhydroquinone.
  • Polyesters capable of forming an anisotropic melt phase which are particularly preferably used in the present invention are those containing about 10 mol% or more of repetitive units containing a naphthalene portion, such as 6-hydroxy-2-naphthoyl, 2,6-dihydroxynaphthalene, and 2,6-dicarboxynaphthalene.
  • Preferable polyester-amides are those containing repetitive units containing the above-mentioned naphthalene portion and a portion comprised of 4-aminophenol or 1,4-phenylenediamine.
  • the term "particulate material” is intended to mean a material the particles of which do not extend in any particular direction unlike a material in the form of fiber, sheet or slip.
  • the ratio of the diameter around the central portion to the length in the perpendicular direction (hereinafter abbreviated to “aspect ratio”) is 3 or less, preferably between 2 and 1.
  • the average particle diameter may be 0.01 ⁇ m to 1 mm, preferably 0.1 to 100 ⁇ m, more preferably 1 to 50 ⁇ m.
  • the particulate material includes silicates such as kaolin, clay, vermiculite, calcium silicate, aluminum silicate, feldspar powder, acid clay, agalmatolite clay, sericite, sillimanite, bentonite, glass powder, glass bead, slate powder, and silane; carbonates such as calcium carbonate, chalk, barium carbonate, magnesium carbonate, and dolomite; sulfates such as baryte powder, blanc fixe, precipitated calcium sulfate, plaster of Paris, and barium sulfate; hydroxides such as hydrated alumina; alumina, antimony oxide, magnesia, titanium oxide, chinese white, silica, silica sand, quartz, silica, white carbon, and diatomite; sulfides such as molybdenum disulfide; particulate metal; organic high-molecular materials such as fluorocarbon resin; organic low-molecular crystals such as brominated diphen
  • particulate materials those exhibiting inherent effects e.g., a specific function and effect such as electrical conductivity and lubricity, have been used in the past to provide such properties in the moulded articles.
  • the particulate materials have been used generally as extenders of plastics and caused unevennessess on the surface of moulded articles containing such extenders, which spoiled the lustre of the articles.
  • the use of the above particulate materials in combination with liquid crystal polyesters in the manner of the present invention improves the surface characteristics of the resulting moulded articles.
  • composition of the present invention also comprises a fibrous material.
  • fibrous material useful for the present invention include glass fibre, carbon fibre, graphitized fibre, whisker, metallic fibre, inorganic fibre, synthetic fibre, mineral fibre, and various organic fibres such as natural fibres.
  • fibrous material is as follows.
  • glass fiber examples include not only ordinary glass fibers but also those coated with a metal such as nickel or copper, silane fiber, aluminosilicate glass fiber, hollow glass fiber, and non-hollow fiber.
  • carbon fiber examples include PAN fiber prepared by making use of polyacrylonitrile as the starting material and pitch fiber prepared by making use of pitch as the starting material.
  • whisker examples include silicon nitride whisker, silicon oxynitride whisker, basic magnesium sulfate whisker, barium titanate whisker, silicon carbide whisker, and boron whisker.
  • metallic fiber examples include fibers made of mild steel, stainless steel, steel and its alloy, brass, aluminum and its alloy, and lead.
  • the inorganic fiber examples include various fibers made of rock wool, zirconia, alumina silica, potassium titanate, barium titanate, silicon carbide, alumina, silica, and blast furnace slag.
  • the synthetic fiber examples include aramid fiber which is a wholly aromatic polyamide and Kynol which is a phenolic resin fiber.
  • Examples of the mineral fiber include asbestos and wollastonite.
  • Examples of the natural fiber include cellulose fiber and hemp yarn.
  • the strength is somewhat lowered. Therefore, when the composition is used in an application where particularly high strength is required, the particulate material is used according to the present invention in combination with the so-called fibrous reinforcing material.
  • the fibrous reinforcing material gives rise to flow marks like moiré fringes. However, it brings about little or no fluffing, and the combined use thereof with the particulate material reduces the occurrence of the flow marks, which makes it possible to improve the strength of the composition without sacrificing the improvement in surface characteristics.
  • the amount of the particulate material added is 0.5 to 70% by weight, preferably 30 to 50% by weight based on the total amount of the composition.
  • the fibrous reinforcing materials used in accordance with the present invention in combination with the particulate material include glass fiber, carbon fiber, graphitized fiber, whisker, metallic fiber, silicon carbide fiber, mineral fibers such as asbestos and wollastonite, and various organic fibers and are not limited to particular materials. It is preferred that the fibrous reinforcing material have a suitable length to diameter ratio. For example, when the diameter is about 10 ⁇ m, the average length of the fiber is 30 ⁇ m to 10 mm, preferably 50 to 700 ⁇ m. That is, it is preferred that the fiber have an aspect ratio of 5 to 70. It is preferred that the fibrous reinforcing material be added in an amount equal to or less than the amount of the particulate material. The use of the particulate material and fibrous reinforcing material in an amount exceeding 70% by weight in terms of the total weight of the two materials based on the total weight of the composition is undesirable from the standpoint of moldability and strength.
  • particulate material and fibrous material useful for the present invention may be used as they are, it is possible and desirable to use them in combination with commonly used known surface treatments and binders.
  • Examples of the surface treatments include functional compounds such as epoxy compounds, isocyanate compounds, silane compounds, and titanium compounds.
  • These compounds may be used in such a manner that the above-mentioned additives are subjected to a surface treatment or binding treatment with these compounds. Alternatively, these compounds may be added together with the above-mentioned additives in preparing the composition. These treatments are effective in improving the physical properties and flowability.
  • the base resins and the above-mentioned various additives may be used alone or in the form of a mixture of two or more of them.
  • liquid crystal polyester of the present invention may be in the form of a polymer blend with other thermoplastic resins in such an amount as will not spoil the purpose of the present invention.
  • thermoplastic resins used in this case are not particularly limited.
  • the thermoplastic resins include polyolefins such as polyethylene and polypropylene, aromatic polyesters comprised of an aromatic dicarboxylic acid and a diol or a hydroxy-carboxylic acid, such as polyethylene terephthalate and polybutylene terephthalate, polyacetal (homopolymer or copolymer), polystyrene, polyvinyl chloride, polyamide, polycarbonate, ABS, polyoxyphenylene oxide, polyoxyphenylene sulfide, and fluorocarbon resin.
  • These thermoplastic resins may be used in the form of a mixture of two or more of them. Further, if necessary, various additives may be added to these resins in order to improve various properties such as mechanical, electrical, and chemical properties and flame retardancy.
  • thermoplastic resins and thermosetting resins i.e., plasticizers, stabilizers such as antioxidants and ultraviolet absorbers, antistatic agents, surfactants, flame retardants, coloring materials such as dyes and pigments, lubricants for improving the flowability and releasability, and crystallization promoters (nucleating agents) can be used at will according to the requirements for properties.
  • the composition of the present invention can be prepared by customary methods which are used for conventional reinforced resins, filled resins, etc.
  • Preferred examples of the methods include a method which comprises mixing individual additives and extruding the mixture with an extruder to prepare pellets having a composition of the present invention and molding the pellets, a method in which pellets having different compositions of materials incorporated therein are mixed when they are molded, and a method in which the components are each directly fed in a molding machine.
  • the present invention has been made based on a finding that the surface characteristics are specifically improved only when a particulate material is incorporated in a liquid crystal polyester.
  • the molded articles comprised of the composition of the present invention in which a fibrous filler is also present not only has high strength but retains excellent surface characteristics, i.e., is less susceptible to surface fibrillation even when friction or percussion is repeatedly applied thereto.
  • a liquid crystal polyester originally exhibits a small molding shrinkage factor.
  • the composition of the present invention exhibits smaller anisotropy when it is injection molded into molded articles, and the molding shrinkage factor is smaller in any portion and any direction. This enables precision molding and also leads to an advantage that molded articles having an excellent dimensional accuracy can be obtained.
  • the present invention has a great advantage that the above improvement can be attained while scarcely spoiling the features of the liquid crystal polyester, i.e., high mechanical strength, high melt flowability, high melting point, and high heat resistance.
  • composition of the present invention is suitable for use in molding of parts to which friction and percussion are applied, e.g., a camera, a pickup of a laser disk, a carriage, an arm and a lead screw of a floppy disk player, or a pickup of a compact disk player. Further, not only the accuracy of the molded articles which have been molded in an exact agreement with the mold by taking advantage of small molding shrinkage can be maintained for a long period of time, but also an adverse effect of resin powder produced by fibrillation can be prevented.
  • the resins A to E were respectively comprised of the following structural units:

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (7)

  1. Flüssigkristallpolyesterzusammensetzung,
    dadurch gekennzeichnet, daß
    sie mindestens 30 Gew.% eines Polyesters und 0,5 bis 70 Gew.% eines teilchenförmigen Füllstoffmaterials enthält, dessen Partikel ein Aspektverhältnis von 3 oder weniger aufweisen, daß der Polyester in der Schmelze verarbeitbar ist und in geschmolzenem Zustand Anisotropie aufweist, und daß ein faserförmiges Material zusammen mit dem teilchenförmigen Füllstoffmaterial einverleibt wird und das faserförmige Material in einer gleichen oder geringeren Menge als das des genannten teilchenförmigen Füllstoffmaterials vorliegt.
  2. Zusammensetzung gemäß Anspruch 1,
    dadurch gekennzeichnet, daß
    das genannte teilchenförmige Füllstoffmaterial mindestens ein Mitglied darstellt, ausgewählt aus der Gruppe, bestehend aus Aluminiumoxid, Kieselsäure, Bariumsulfat, Glasperlen, Glaspulver, organischen hochmolekularen Materialen wie einem Fluorkohlenstoffharz und organischen niedermolekularen Kristallen wie bromiertem Diphenylether.
  3. Zusammensetzung gemäß Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß
    das Aspektverhältnis der Partikel des teilchenförmigen Materials im Bereich von 1 bis 2 liegt.
  4. Zusammensetzung gemäß jedem vorhergehenden Anspruch,
    dadurch gekennzeichnet, daß
    der Durchschnittsteilchendurchmesser des teilchenförmigen Füllstoffmaterials 0,2 bis 100 µm beträgt.
  5. Zusammensetzung gemäß jedem Anspruch 1 bis 4,
    dadurch gekennzeichnet, daß
    das faserförmige Material ein Aspektverhältnis von 5 bis 70 aufweist.
  6. Flüssigkristallpolyesterharzzusammensetzung gemäß jedem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, daß
    das faserförmige Material mindestens eine Faser darstellt, ausgewählt aus der Gruppe, bestehend aus Glasfaser, Kohlenstoffaser, graphitierter Faser, Whisker, metallischer Faser, anorganischer Faser, synthetischer Faser und Mineralfaser.
  7. Zusammensetzung gemäß jedem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, daß
    das Gesamtgewicht des teilchenförmigen Füllstoffmaterials und des faserförmigen Materials nicht mehr als 70 Gew.% beträgt, bezogen auf Gesamtgewicht der Zusammensetzung.
EP87310816A 1986-12-10 1987-12-09 Flüssigkristallpolyester enthaltende Harzzusammensetzung Expired - Lifetime EP0271327B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61294427A JPH0739534B2 (ja) 1986-12-10 1986-12-10 表面特性の良好な液晶性ポリエステル樹脂組成物
JP294427/86 1986-12-10

Publications (3)

Publication Number Publication Date
EP0271327A2 EP0271327A2 (de) 1988-06-15
EP0271327A3 EP0271327A3 (en) 1989-11-02
EP0271327B1 true EP0271327B1 (de) 1993-04-28

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EP87310816A Expired - Lifetime EP0271327B1 (de) 1986-12-10 1987-12-09 Flüssigkristallpolyester enthaltende Harzzusammensetzung

Country Status (5)

Country Link
US (1) US4888127A (de)
EP (1) EP0271327B1 (de)
JP (1) JPH0739534B2 (de)
KR (1) KR920004812B1 (de)
DE (1) DE3785649T2 (de)

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Also Published As

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EP0271327A2 (de) 1988-06-15
KR880007654A (ko) 1988-08-29
EP0271327A3 (en) 1989-11-02
JPS63146958A (ja) 1988-06-18
DE3785649D1 (de) 1993-06-03
KR920004812B1 (ko) 1992-06-18
US4888127A (en) 1989-12-19
JPH0739534B2 (ja) 1995-05-01
DE3785649T2 (de) 1993-08-12

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